Plz plz help spanish spekers

The second one is at school I always have my backpack

1. my history class isn’t boring because the teacher is interesting. The class is fun but is hard. When a class is hard, I need to work a lot to get good notes.
2. I always have my backpack at school.
3. I like to spend some time at the library with Claudia. Claudia uses the computer but I have to study.

Buenas noches. that is the correct way to say it.